Hope 31.8 OS DH 0° 50mm Stem 1-1/8"

Product Overview

The Hope OS DH stem is a CNC-machined aluminum stem designed for downhill, enduro, and freeride applications, though it can be adapted for BMX use. Built from a solid 2014-T6 aluminum block with reinforced clamping architecture, it delivers exceptional rigidity and precise bar positioning through a 31.8mm clamp and 0° rise angle. The triple-clamp design and increased material density around critical stress points make this stem a heavy-duty choice for riders prioritizing stability and control over weight savings.

Key Features

• CNC machined 2014-T6 aluminum – Precision-cut from a solid aluminum block with reinforced geometry for maximum durability and impact resistance
• Triple opposing clamping screws – Three offset screws on the steerer tube clamp provide unmatched fork connection rigidity and eliminate rotational movement
• Front-load handlebar clamp – Single-piece clamping design with 4 screws secures 31.8mm diameter bars with consistent pressure across the full diameter
• 31.8mm clamp diameter – Direct compatibility with modern 31.8mm bars eliminates adapter sleeves and creates a more rigid cockpit interface
• Reinforced pivot and clamp zones – Increased material thickness around stress concentration points improves structural integrity under heavy impact and vibration
• Stainless steel hardware – Corrosion-resistant fasteners maintain clamping integrity in wet or harsh riding conditions
• 0° rise angle – Neutral stem geometry delivers a straightforward, direct connection from fork to bars without additional bar rise
• Made in UK – British engineering and manufacturing standards ensure precise tolerances and quality control

Technical Specifications

• Material: 2014-T6 aluminum alloy
• Steerer tube size: 1-1/8" (integrated or threaded headsets)
• Handlebar clamp diameter: 31.8mm
• Clamp type: Front-load single-piece design
• Clamp screws: 4 handlebar screws + 3 steerer tube clamps
• Fasteners: Stainless steel
• Length: 50mm (center of steerer to center of bar clamp)
• Rise angle: 0°
• Weight: 215g
• Origin: Made in UK

Compatibility & Ideal Use Cases

This stem is designed for 1-1/8" steerer tubes and 31.8mm diameter handlebars. While engineered for downhill and freeride mountain biking, its rigid construction and proven clamping architecture make it suitable for BMX riders seeking maximum stability and control. Ideal for riders running 31.8mm bars who prioritize durability, precise bar positioning, and uncompromising rigidity over minimal weight. Compatible with integrated or threaded 1-1/8" headsets and any 31.8mm handlebar.